| Yaskawa Motor, Driver SG- | Mitsubishi Motor HC-, HA- |
|---|---|
| Westinghouse Modules 1C-, 5X- | Emerson VE-, KJ- |
| Honeywell TC-, TK- | GE Modules IC - |
| Fanuc motor A0- | Yokogawa transmitter EJA- |
| Model Number | Description | Manufacturer |
|---|---|---|
| SGM-01A312 | SGM01A312 .87AMP 100W | yaskawa |
| SGM-01A312B | SGM01A312B SERVO MOTOR | yaskawa |
| SGM-01A312C | SGM01A312C SERVO MOTOR | yaskawa |
| SGM-01A312S | SGM01A312S .87AMP 200V 100WATT | yaskawa |
| SGM-01A314 | SGM01A314 100WATT 200VAC | yaskawa |
| SGM-01A314B | SGM01A314B SERVO MOTOR | yaskawa |
| SGM-01A314B | SGM01A314B # ZL02 SERVO MOTOR | yaskawa |
| SGM-01A314C | SGM01A314C 3000RPM 100W 200V | yaskawa |
| SGM-01A314P | SGM01A314P SERVO MOTOR | yaskawa |
| SGM-01A3G24 | SGM01A3G24 SERVO MOTOR | yaskawa |
It is sometimes helpful to see a visual representation of the stepping sequence. Adding an LED and current-limiting resistor in parallel with the outputs provides just such a visual indication. See Fig. 19.11 for a wiring diagram. Note the special wiring to the flip-flop outputs. This provides a better visual indication of the stepping action than hooking up the LEDs in the same order as the motor phases.
Figure 19.12 shows two stepper motor translator boards. The small board controls up to two stepper motors and is designed using TTL chips. The LED option is used to provide a visual reference of the step sequence. The large board uses CMOS chips and can accommodate up to four motors. The boards were wire-wrapped; the driving transistors are placed on a separate board and heat sink.
You need a square wave generator to provide the triggering pulses for the motors. You can use the 555 timer wired as an astable multivibrator, or make use of a control line in your computer or microcontroller. When using the 555, remember to add the 0.1 µF capacitor across the power pins of the chip. The 555 puts a lot of noise into the power supply, and this noise regularly disturbs the counting logic in the Exclusive OR and flip-flop chips. If you are getting erratic results from your circuit, this is probably the cause.